AUTHOR=Kuo Jane , Kuo Cheng-Deng TITLE=Decomposition of Heart Rate Variability Spectrum into a Power-Law Function and a Residual Spectrum JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=3 YEAR=2016 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2016.00016 DOI=10.3389/fcvm.2016.00016 ISSN=2297-055X ABSTRACT=
The power spectral density (PSD) of heart rate variability (HRV) contains a power-law relationship that can be obtained by plotting the logarithm of PSD against the logarithm of frequency. The PSD of HRV can be decomposed mathematically into a power-law function and a residual HRV (rHRV) spectrum. Almost all rHRV measures are significantly smaller than their corresponding HRV measures except the normalized high-frequency power (nrHFP). The power-law function can be characterized by the slope and